Circular-glass cutter.



W. CHASE, JR. CIRCULAR GLASS CUTTER.

APPLICATION FILED JULY 1, 1909.

9,3 1 l a Patented. May 24, 1910.

ATTORNE Y8 WILLIAM CHASE, JIL, OF INDIANA PQLIS, INDIANA.

' cmoumn-eness corms.

Application filed July 1, 1909. Serial No. 505,349.

To all whom it may concern:

Be it known that I, WILLIAM CHAsE, J r., a citizenof the United States,and a resident of Indianapolis, in the county of Marion and State ofIndiana, have invented a new and Improved Circular-Glass Cutter, ofwhich the following is a full, clear, and exact description.

Among the principal objects which this invention has in view are torovide an implement which may be central y located upon the surface ofglass and there immovably held, and to rovide a swin 'ng arm pivotallymounted upon a fixe structure and hingedly secured thereto. 7

Reference is to be had to the accompanying drawings formin a part ofthis specification, in which simi ar characters of refer-' ence indicatecorresponding parts in all the views.

Figure 1 is a perspective view of a glass cutter constructed inaccordance with the present invention; Fig. 2 is a vertical section ofthe same, showing the extension rod in full lines; and Fig. 3 is across-section taken on the line 3-3 in Fig. 2.

The extension rod 4 is partly circular in cross-section and is providedwith a fiattened upper surface 5 which forms a guide for the head 6. Onthe rounded surface of the rod 4 are provided scale markings 7byscrew-threaded nut 11. The head 6 is per-- forated, as shown at Fig. 3of the drawings, to snugly fit the extension rod 4. Itis upon theflattened or square surface 5 of the extension rod 4 that the rubberwasher 12 is seated when the nut 11 is screwed up on the extension 10. i

The washer 12 being constructed of a suitable material, the head 6 isheld in the position to which it is adjusted before the nut 11 istightened. This adjustment is aided by means of the scale 7. This scaleis constructed with reference to the center of the pivot on which therod 4 swings, that is, the first marking of the scale from the pivot isthe marking to represent the number of inches or fractions thereof atwhich the said marking is removed from'the pivot.

The pivot consists of a tubular extension set up from a circular plate13. The tubular extension is provided with a converged end 14, betweenwhichand the body of the extension there. is formed a groove 15 providedto receive'the ring 16, surrounding an opening in the rubber bulb 17.The tubular extension is further provided with a central openin 18communicating from the inside of the ulb 17 and with a chamber formedunder the plate 13 by the flange 19 and the rubber gasket 20. The flange19 is of slightly less diameter than the plate 13, formin thereby arabbeted edge to receive the gas et 20. The gasket 20 is constructed ofsuit-able rubber, that most preferred being soft in texture, and isadapted to conform to the surface of the glass and to form an air-tightjoint therewith.

The tubular extension is ooved at 21 to receive a pin 22 which is driventangentially across .the opening in a collar 23 to form a. lock pin tohold the said collar in rotary position upon the said extension. The pin22 is elongated to extend beyond the collar 23 to form the'hinge pivotsfor the hinge end 24. The collar 23 is flattened on the twooppositesides, as at 25, to accommodate the hinged extensions 26 of the bin eend 24 and thereby provide ides for t e hinge swing of the hinged en24and the extension rod 4 to which it is secured by the threadedextension 27 of the -said rod 4. At the rear end of the said loop thesurface 28 is extended to pivot 22 of the bin ed end .24 and the rod 4connectedtherewit Specification of Letters intent. v Patented May 1910.I

Having an implement constructed as is as follows: Having located thecenter from which the cutting is desired, the plate 13 is placed inposition concentrically therewith. The. bulb 17 is compressed to ejectthe air therefrom when the gasket 20 by means of the plate 13 is pressedfirmly against the glass while the bulb 17 is released. The bulb 17 isconstructed of strong resilient walls adapted to resume their sphericalshape, rare ing the air contained within the said bu b and the chamberformed below the plate 13, forming a strong and persistent suction. Thissuction secures the ivot extension firmly in position. The head 6 is nowadjusted to the desired cut, and when so adjusted the screw 11 istightened to set thewasher 12 hard down on the fiat extension 5 of therod 4; 'The head 6, carrying the cutter 9, is now in position foroperation. This is accomplished by lowering the cutter upon the surfaceofthe glass and bearing upon the rod suificiently to embed the cutting(point in the glass as the rod is swept aroun the pivot center of theextension on the plate 13. When the circular cut is formed as desired,the instrument is released from its hold on the glass by compressing thebulb 17, which relieves the rarefaction in the chamber under the plate13 and releases the same and overcomes the air suction produced by theabovedescribed operation.

Having thus described my inventionfI claim as new and desire to secureby Letters Patent:

1. A circular lass cutter comprising a fixed metal plate aving adepending yielding continuous flange and a vertical exten sion adaptedto form a pivot for a swin ing arm, said extension being perforated, toorm communication with the under side of the said plate, means forextracting the air from under said plate to cause a partial vacuumthereunder, and an extension arm pivotally connected with said verticalextension and carrying a cutting instrument adapted to cut glass.

2. A circular glass cutter comprising a metal plate havin a continuousyielding depending flange a apted to form a chamber under said plate inconjunction with the glass to be out, said plate having a verticalextension provided with a tubular perforation 0 ening outward from saidchamber formed by said flange, a collar surrounding said verticalextension, an extension rod hingedly connected to said collar, a cuttindevlce slidably mounted upon said rod, an means for rarefying the airbelow said plate to form a suction to seat the said yielding flange uponthe said glass.

3. A circular glass cutter comprising a late having a continuousyieldingde endlng flange adapted to form a chamber elow the said platein conjunction with the glass to be cut, said plate having a tubularextension provided with a perforation leading outward from said chamber,a collar pivotally mounted upon said vertical extension, a rod hingedlyconnected with said collar, a cutting instrument slidably mounted uponsaid rod, and a resilient compressible bulb adapted to fit over the saidvertical extension to be compressed to displace the air in said chamber,and expanded to rarefy the remaining air in said chamber.

4. A clrcular glass cutter com rising a plate having a rubber gasketepending' rom said plate to form a chamber below the same, said platehaving a tubular extension forming an air passage outward from saidchamber, a collar pivotally mounted upon said extension, an extensionrod hingedl connected to said collar and provided with scale markings, acutting instrument slidably mounted upon said rod, means for holding thesaid cutting instrument fixedly in position on said rod, and acompressible rubber bulb adapted to extend over said extension andadapted by a compression and expansion thereof to form a rarefication ofthe same in said chamber under said plate.

5. A circular glass cutter comprising a plate having a continuous rubbergasket depending therefrom to form a chamber beneath the said plate inconjunction with the glass to be cut, a vertical tube mounted upon saidplate and forming open communication with the chamber below the same,said tube having a groove at the u per end to receive and hold acompression bulb, a collar pivotally mounted upon said tube, anextension rod hingedly connected to said collar, a cuttin implementadapted to slide longitudinal y on said rod, means for maintaining saidcutting implement in a vertical position, and a collapsible rubber bulbadapted to extract the air from the chamber formed under the said plateand within the said rubber gasket.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

WILLIAM CHASE, JR. Witnesses:

CHARLES M. DEEM, JOHN A. MOORE.

